Merge pull request #15 from sve2-2020ss/fix/db-schema

fix db schema primary key

_db/create.sql

@@ -1,10 +1,13 @@
+DROP TABLE measurement;
+DROP TABLE station;
+
 CREATE TABLE station(
     id SERIAL PRIMARY KEY NOT NULL,
     name varchar(255) NOT NULL
 );
 
 CREATE TABLE measurement(
-    station_id SERIAL NOT NULL,
+    station_id INTEGER NOT NULL,
     temperature DOUBLE PRECISION NOT NULL,
     humidity DOUBLE PRECISION NOT NULL,
     air_pressure DOUBLE PRECISION NOT NULL,
@@ -13,12 +16,15 @@ CREATE TABLE measurement(
     CONSTRAINT pk_measurement PRIMARY KEY(station_id, created_at)
 );
 
-INSERT INTO station (id, name) VALUES (1, 'station1');
-INSERT INTO station (id, name) VALUES (2, 'station2');
-INSERT INTO station (id, name) VALUES (3, 'station3');
-INSERT INTO station (id, name) VALUES (4, 'station4');
-INSERT INTO station (id, name) VALUES (5, 'station5');
-INSERT INTO station (id, name) VALUES (6, 'station6');
-INSERT INTO station (id, name) VALUES (10, 'ESP8266-powered weather station');
+INSERT INTO station (name) VALUES ('station1');
+INSERT INTO station (name) VALUES ('station2');
+INSERT INTO station (name) VALUES ('station3');
+INSERT INTO station (name) VALUES ('station4');
+INSERT INTO station (name) VALUES ('station5');
+INSERT INTO station (name) VALUES ('station6');
+INSERT INTO station (name) VALUES ('station7');
+INSERT INTO station (name) VALUES ('station8');
+INSERT INTO station (name) VALUES ('station9');
+INSERT INTO station (name) VALUES ('ESP8266-powered weather station');
 
 COMMIT;